The<i>in Situ</i>-generated Nickel(0)-catalyzed Reaction of Aryl Halides with Potassium Iodide and Zinc Powder
作者:Kentaro Takagi、Naomi Hayama、Saburo Inokawa
DOI:10.1246/bcsj.53.3691
日期:1980.12
in situ-generated nickel(0) species, presumably atomic nickel, from nickel(II) salt and zinc powder has been proved to be an effective catalyst for the Finkelstein-type displacement reaction of aryl bromides with potassium iodide to give aryl iodides under mild conditions. This species was also effective for the Ullmann-type coupling of bromides or aryl iodides by the use of zinc powder to give biaryls
来自镍 (II) 盐和锌粉的原位生成的镍 (0) 物种,可能是原子镍,已被证明是芳基溴化物与碘化钾的芬克尔斯坦式置换反应的有效催化剂,在条件温和。通过使用锌粉生成联芳基化合物,该物种对于溴化物或芳基碘化物的 Ullmann 型偶联也是有效的。此外,在过量镍 (II) 盐的存在下,偶合反应即使在环境温度下也能顺利进行,以非常好的收率得到各种联芳基化合物。
Palladium/Sensory Component-Catalyzed Homocoupling Reactions of Aryl Halides
A novel and efficient catalyst system was developed for homocouplingreactions of aryl halides. The catalyst system consists of Pd(OAc)2 and the peppery sensory component of tobacco leaves. This is the first time that a sensory component has been used in an organic reaction. Experiments using the catalyst system showed that the reactions proceeded smoothly under air in the absence of both an additional
Palladium-Catalyzed Inter- and Intramolecular Coupling Reactions of Aryl and Vinyl Halides Mediated by Indium
作者:Phil Ho Lee、Dong Seomoon、Kooyeon Lee
DOI:10.1021/ol047567v
日期:2005.1.1
Treatment of aryl and vinylhalides with 50 mol % of 100 mesh indium, 2.5 mol % of Pd-C, and 1.5 equiv of LiCl under mild conditions (DMF, 100 degrees C, 1-3 h) could produce coupling products efficiently in good to excellent yields in which the C(sp2)-C(sp2) bond was formed. This reagent worked equally well with both intermolecular and intramolecular coupling reactions, producing a variety of biaryls
Abstract Chiral ionic liquids (CILs) are widely used solvents and materials with prominent properties. Carbohydrate-derived imidazolium-based CILs represent a distinctive type of CILs possessing multiple chiral centers from natural chiral pool. Herein, a series of glucopyranoside-substituted imidazolium-based CILs (Glu-imi-CILs) were synthesized and evaluated as ligands for Pd-catalyzed homo-coupling
Efficient Pd-catalyzed oxidative homocoupling of arylboronic acids in aqueous NaClO
作者:Min-Xin Li、Yan-Ling Tang、Hui Gao、Ze-Wei Mao
DOI:10.1016/j.tetlet.2020.151784
日期:2020.4
An efficient, mild and practical method was developed for the synthesis of biaryls via the Pd-catalyzed oxidativehomocoupling of aromatic/heteroaromatic boronic acids in aqueous NaClO.